# Top-level Makefile for Emacs under MS-DOS/DJGPP v2.0 or higher. -*-makefile-*-

# Copyright (C) 1996-2025 Free Software Foundation, Inc.

# This file is part of GNU Emacs.

# GNU Emacs is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.

# GNU Emacs is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.

# You should have received a copy of the GNU General Public License
# along with GNU Emacs.  If not, see <https://www.gnu.org/licenses/>.

# make all	to compile and build Emacs.
# make install	to install it (installs in-place, in `bin' subdir of top dir).
# make TAGS	to update tags tables.
#
# make clean  or  make mostlyclean
#      Delete all files from the current directory that are normally
#      created by building the program.	 Don't delete the files that
#      record the configuration.  Also preserve files that could be made
#      by building, but normally aren't because the distribution comes
#      with them.
#
#      Delete `.dvi' files here if they are not part of the distribution.
#
# make distclean
#      Delete all files from the current directory that are created by
#      configuring or building the program.  If you have unpacked the
#      source and built the program without creating any other files,
#      `make distclean' should leave only the files that were in the
#      distribution.
#
# make maintainer-clean
#      Delete everything from the current directory that can be
#      reconstructed with this Makefile.  This typically includes
#      everything deleted by distclean, plus more: *.elc files,
#      C source files produced by Bison, tags tables, info files,
#      and so on.
#
# make extraclean
#      Still more severe - delete backup and autosave files, too.

# This gork is required for those who use a Unix-style shell, and
# have SHELL in the environment pointing to it.  Here we force
# Make to use COMMAND.COM instead.  This Makefile won't work otherwise.
# (The /xyzzy directory is used to minimize the chance that someone
# actually has such a directory with an incompatible command.com.  We
# used to have /dos there, but some Windows installations have an old
# version of DOS stashed in that directory, and command.com from there
# won't run on Windows, complaining about "Incorrect DOS version".
# Make will look up PATH for the shell executable, so the directory name
# is not important.)
SHELL=/xyzzy/command
MAKESHELL=/xyzzy/command

# Generate a full pathname of the top-level installation directory
top_srcdir := $(subst \,/,$(shell cd))

# Q: Do we need to bootstrap?
# A: Only if we find msdos/autogen/Makefile.in, i.e. we are building out of
#    a VCS-checkout (not a release), and src/b-emacs.exe does not exist.
#    This avoids building a bootstrap-emacs and recompiling Lisp files
#    when building a pretest/release tarball.  Recompiling Lisp files
#    is BAD because lisp/Makefile.in requires a Unixy shell.
boot :=
ifneq ($(wildcard msdos/autogen/Makefile.in),)
ifeq ($(wildcard src/b-emacs.exe),)
boot := b-emacs.exe
endif
endif

# Subdirectories to run Make.  `lisp' is not included because the
# compiled lisp files are part of the distribution.  (If we are
# bootstrapping, the src target will run Make in `lisp' as well.)
# leim is not included because it is part of the src target.
all:	lib lib-src src emacs misc lispref lispintro

lib: FRC
	cd lib
	$(MAKE) top_srcdir=${top_srcdir} all
	cd ..

lib-src: lib FRC
	cd lib-src
	$(MAKE) top_srcdir=${top_srcdir} all
	cd ..

# Pass to src/Makefile.in an additional BOOTSTRAPEMACS variable which
# is either set to b-emacs.exe (in case bootstrap-emacs has not been
# constructed yet) or the empty string (otherwise).
# src/Makefile.in uses it to implement conditional dependencies, so that
# files that need bootstrap-emacs to be built do not additionally need
# to be kept fresher than b-emacs.exe.  Otherwise changing a single
# file src/foo.c forces dumping a new bootstrap-emacs, then re-byte-compiling
# all preloaded elisp files, and only then dump the actual src/emacs, which
# is not wrong, but is overkill in 99.99% of the cases.
src: lib lib-src FRC
	cd src
	$(MAKE) top_srcdir=${top_srcdir} BOOTSTRAPEMACS="${boot}" all
	djecho -s '/-geometry/s,^.*,set environment HOME $(top_srcdir),' \
	          '/environment *TERM/s/^.*/set environment TERM internal/' \
	       >gdb.sed
	sed -f gdb.sed _gdbinit >gdb.tmp
	djecho -a gdb.tmp -s 'set environment USER root' \
	                     'set environment NAME root' \
	                     'set environment USERNAME root' \
	                     'set environment EMACSPATH $(top_srcdir)/bin' \
	                     'set environment SHELL $(subst \,/,$(COMSPEC))' \
	                     'set environment PATH $(subst \,/,$(PATH))'
	update gdb.tmp gdb.ini
	rm -f gdb.tmp gdb.sed
	cd ..
	if exist src\bootlisp redir $(MAKE) -C lisp top_srcdir=${top_srcdir}
	rm -f src/bootlisp
	if exist leim\Makefile redir $(MAKE) -C leim top_srcdir=${top_srcdir}

info: emacs misc lispref lispintro

emacs misc lispref lispintro:	FRC
	cd doc/$@
	$(MAKE) top_srcdir=${top_srcdir} info
	cd ../..

install: all
	if not exist bin\nul md bin
	cd lib-src
	command.com /c >/dev/null for %p in (hexl etags ctags ebrowse) do\
	   if exist %p.exe mv -f %p.exe ../bin
	cd ..
	cd src
	mv -f emacs.exe ../bin/
	cd ..
	djecho -s "(if (fboundp 'normal-top-level-add-subdirs-to-load-path)" \
	          "    (normal-top-level-add-subdirs-to-load-path))" \
	    > ./subdirs.el
	if not exist .\site-lisp\subdirs.el \
	   update ./subdirs.el ./site-lisp/subdirs.el
	rm -f ./subdirs.el

FRC:

# We cannot use [a-zA-Z]* like the mainline distribution does, because
# that causes all file names to be returned in upper-case on DOS...
# Must use `find' to filter out loaddefs files; ignore errors if `find'
# is not available or is an MS `find'.
# The "cd $(CURDIR)" gork is for when `find' fails and leaves us inside
# `lisp' or one of its subdirectories.
TAGS tags:	lib-src FRC
	cd lib-src
	if exist etags.exe mv -f etags.exe ../bin
	cd ..
	- find $(CURDIR)/lisp -iname "*.el" -a -! -( -iname "*loaddefs.el" -o -iname "ldefs-boot.el" -) | ./bin/etags -o lisp/TAGS -
	cd $(CURDIR)
	cd src
	../bin/etags --include=../lisp/TAGS \
	 --regex='/[ 	]*DEFVAR_[A-Z_ 	(]+"\([^"]+\)"/' \
	 $(CURDIR)/src/*.c $(CURDIR)/src/*.h
	cd ..
	./bin/etags --include=src/TAGS

check:
	@echo "We don't have any tests for GNU Emacs yet."

clean mostlyclean:
	cd lib
	$(MAKE) $(MFLAGS) $@
	cd ..
	cd lib-src
	$(MAKE) $(MFLAGS) $@
	cd ..
	cd src
	$(MAKE) $(MFLAGS) $@
	cd ..
	cd doc
	cd emacs
	-$(MAKE) $(MFLAGS) $@
	cd ..
	cd misc
	-$(MAKE) $(MFLAGS) $@
	cd ..
	cd lispref
	-$(MAKE) $(MFLAGS) $@
	cd ..
	cd lispintro
	-$(MAKE) $(MFLAGS) $@
	cd ..
	cd ..
	cd leim
	if exist Makefile redir $(MAKE) $(MFLAGS) $@
	cd ..

top_distclean=rm -f Makefile */Makefile src/_gdbinit

distclean maintainer-clean: FRC
	cd src
	$(MAKE) $(MFLAGS) $@
	if exist bootlisp rm -f bootlisp
	cd ..
	cd lib
	$(MAKE) $(MFLAGS) $@
	cd ..
	cd lib-src
	$(MAKE) $(MFLAGS) $@
	cd ..
	cd doc
	cd emacs
	-$(MAKE) $(MFLAGS) $@
	cd ..
	cd misc
	-$(MAKE) $(MFLAGS) $@
	cd ..
	cd lispref
	-$(MAKE) $(MFLAGS) $@
	cd ..
	cd lispintro
	-$(MAKE) $(MFLAGS) $@
	cd ..
	cd ..
	cd leim
	if exist Makefile redir $(MAKE) $(MFLAGS) $@
	cd ..
	cd lisp
	$(MAKE) $(MFLAGS) $@
	cd ..
	${top_distclean}

extraclean:
	cd src
	$(MAKE) $(MFLAGS) $@
	cd ..
	cd lib
	$(MAKE) $(MFLAGS) $@
	cd ..
	cd lib-src
	$(MAKE) $(MFLAGS) $@
	cd ..
	cd doc
	cd emacs
	-$(MAKE) $(MFLAGS) $@
	cd ..
	cd misc
	-$(MAKE) $(MFLAGS) $@
	cd ..
	cd lispref
	-$(MAKE) $(MFLAGS) $@
	cd ..
	cd lispintro
	-$(MAKE) $(MFLAGS) $@
	cd ..
	cd ..
	cd leim
	if exist Makefile redir $(MAKE) $(MFLAGS) $@
	cd ..
	cd lisp
	$(MAKE) $(MFLAGS) $@
	cd ..
	${top_distclean}
	-rm -f *~ #*

.PHONY: bootstrap

bootstrap-clean: FRC
	cd lib
	-$(MAKE) $(MFLAGS) maintainer-clean
	cd ..
	cd src
	$(MAKE) $(MFLAGS) $@
	cd ..
	cd lib-src
	$(MAKE) $(MFLAGS) maintainer-clean
	cd ..
	cd doc
	cd emacs
	-$(MAKE) $(MFLAGS) maintainer-clean
	cd ../misc
	-$(MAKE) $(MFLAGS) maintainer-clean
	cd ../lispref
	-$(MAKE) $(MFLAGS) maintainer-clean
	cd ../lispintro
	-$(MAKE) $(MFLAGS) maintainer-clean
	cd ..
	cd ..
	cd leim
	$(MAKE) $(MFLAGS) maintainer-clean
	cd ..
	cd lisp
	$(MAKE) $(MFLAGS) bootstrap-clean
	cd ..
	${top_bootclean}

bootstrap: bootstrap-clean FRC
	command.com /e:2048 /c config msdos
	$(MAKE) $(MFLAGS) info all
